Planoorapii co



M. .PELZER. GAS ATTACHMENT FOR HEATING FURNACES.

APPLTCATIQN FILED MAY 16, I917;

1310,9261 v Patented Ju ly 22,1919.

THE CqLuMnlA PLANOGRAPH co, WASHINGTON, n, c.

this specification.

the way around it to form an air hurra snares Parana. orrroa. I

. IMATILDA PlELZE-R,OF NORWOOD, OHIO.

GAS. 'ArrAci-iivm vr For. HnarIivG FUn AcEs.

T 0 aZZau/wmit may c'onccrnr Be it known that I, MATILDA PELZER, a citizen of the. United States, and a resident of theeity of Norwood, in the county of Hamilton and State of Ohio, haveinve'nted certain new and useful Improvements in Gas Attachments for Heating-Furnaces, of

which the following is a full, clear, and ex act description, reference being made to the accompanying drawings, forming part of,

devices which adusual coal, hot air My invention relates to mit of installation in the furnace for residence use, for the use of gas} fuel.

vices were not successful in heating the resi dences, or else were very wasteful of gaseous fuel.

One of the essential features of my invention is that my device is designed for placing it in the dome on top of all furnaces from which the hot air pipes radiate. The device can thus be set on top of whatever radiator device there is to enforce circulation of air around the fire pot of the fur nace, and will heat the out any extra air ducts or the like, just at the point where it enters the pipes. Not only this, but the heater will be close to the ceiling, being on top of the-furnace and the heat will be subjected to less cooling tendency from the air of the furnace room.

It is also desired that the heater be of dome shape so as to present about an equal heating amount of heating surface opposite the outlet of each pipe, and let air pass all jacket against overheating the dome shell of the furnace. The above features and others to be mentioned I accomplish. by that certain construction and arrangement of parts to be hereinafter more specifically pointed out and claimed.

, 1 a heating purposes Many devices have been tried in tliepast' for this purpose but have not proved a suc-' position where they incoming air with- Specification of Letters Patent. A Patented uly22, 19151 Application filed May 16,1917. Seria1No. 169,076.

In the drawings,

-Figure l is aside elevation of a furnace with'my device in place.

v Fig. 2 is a section taken vertically'through the furnace.

3 is'a section showing the means adopted preferably by me when the dome of the furnace is too low to accommodate the device.

r Fig. 4.- is a plan view taken from above the furnace.

'The furnace 1, having a fire pot 2 and a radiator 3, is intended to representthe usual type of hot air furnace in use for residence at the present time. The outer shell 4 ofthe furnace is cylindrical and atthe top of the shell i is almost universally placed a dome shell 5 of sheet metal like the shell 4, but in the shape of a trun cated cone. In this dome shell or cone, the openings 6for the hot air pipes 17 are cut, so'that the pipes radiate from the dome.

Some furnaces vary in height of .dome and accordingly lar portion 18tobe secured on the upper edge of the shell l of the furnace, in place of 'the dome, and then mount the dome on top of the cylindrical collar. This collar serves as a mere insert and as is obvious does not require any essential modification of the furnace.

The usual type of furnace has the radiator 3 which causes the air entering the furnace to circulate around in contact with the escaping gases from the furnace. I prefer that my of this radiator, and there may have to be some modification of the means for securing the device to the radiator, since mere legs may not be sutlicient in some instances due to special shape of radiator. Thus while the following description speaks of but one method of attachment, it should be remembered that the plan will be in installation to examine the radiator and equip the fire casing of the device with proper means of seating or attaching it to the radiator. It may lso be attached in the furnace in other ways.

The device has a fire casing comprising a circular dome-shape piece 7 of cast metal of considerable thickness, and a base plate 8 of like metal. Running outwardly from the dome at the front of the device is a rectangular port 9, which is closed off at I prov de a cylindrical e01:

device he merely set on the top edge the outer end by a door 10. Extending into the dome through suitable openings beneath the door are the as fuel pipes 11.

Preferably the fiurners are made up of perforated pipes each extending in a semicircle, to make the burners 12,12, which extend around the dome in close proximity to the inner surface thereof. The casting has in the top an upwardly extending tube 13, with a downwardly depending tube 14:. The products of combustion pass from the burners in this preferred arrangement around the inside of the dome and thence down through the middle thereof to the lower end of'the tube 14, Whence they pass up through the tube, into any suitable pipe 15. The space in the interior of the dome may be filled with fire clay balls or the like to retain heat for a considerable period so as to permit regulation of the heat given off by the furnace.

The door to, the casting may be employed to regulate the degree of temperature generated within the dome.

For mounting the casting or dome on the radiator 3. there are shown the legs 16 which.

are designed to rest on the radiator and elevate the base S-above the top of the radiator so as to permit air to pass up through the radiator around the base of the device.

' It can be seen that the principle involved in the dome-shaped fire casing isto bring the outer surfaee thereof approximately equ distant from all pipe openings There 09 919. mm; m; b abte sse, 193:

is no chance of gas or fumes getting into contact with the air that goes into the pipes, except that which may be due to the air duct" taking air from the furnace room and gas escaping from a leaking fine or pipe into the'room which is likely to occur in any gas furnace, or coal furnace. p

The exact shape of the dome is not insisted upon, nor the shape or nature of the burners, nor are the exact means of securing the device in place on the top of the radiaheater comprising a casing to fit within said dome-shaped portion and having a passage- Way to. the oilbslde of the cas ng through which the air enters the casing, gas burners in the casing, and an outlet from the casing for theproducts of combustion, said casing being entirely inclosed inside of the furnace casing, as and for the purpose described.

MATILDA PELZEB.

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